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Income Tax Expense - Schedule of Changes in Deferred Income Tax Assets (Liabilities) (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | ₩ (3,570) |
Deferred tax liability (asset) end of period | (4,323) | ₩ (3,570)
Deferred tax assets, start of period | 5,952 | 5,660
Increase (decrease) | (335) | 292
Deferred tax assets, end of period | 5,617 | 5,952
Deferred tax liabilities, start of period | (2,382) | (2,832)
Increase (decrease) | 1,088 | 450
Deferred tax liabilities, end of period | (1,294) | (2,382)
Property and equipment |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 51 | 38
Increase (decrease) | 126 | 13
Deferred tax liability (asset) end of period | 177 | 51
Intangible assets |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 665 | 442
Increase (decrease) | (582) | 223
Deferred tax liability (asset) end of period | 83 | 665
Other non-current assets |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 25 | 202
Increase (decrease) | (11) | (177)
Deferred tax liability (asset) end of period | 14 | 25
Accounts payables |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 1,518 | 1,701
Increase (decrease) | 252 | (183)
Deferred tax liability (asset) end of period | 1,770 | 1,518
Accrued expenses |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 282 | 233
Increase (decrease) | 29 | 49
Deferred tax liability (asset) end of period | 311 | 282
Deferred revenue |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 355 | 94
Increase (decrease) | (273) | 261
Deferred tax liability (asset) end of period | 82 | 355
Allowance for doubtful account |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 1,179 | 299
Increase (decrease) | (1,122) | 880
Deferred tax liability (asset) end of period | 57 | 1,179
Other non-current liabilities |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 82 | 81
Increase (decrease) | (4) | 1
Deferred tax liability (asset) end of period | 78 | 82
Lease |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | (38) | (30)
Increase (decrease) | 22 | (8)
Deferred tax liability (asset) end of period | (16) | (38)
Investments in subsidiaries |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | (2,368) | (2,791)
Increase (decrease) | 1,170 | 423
Deferred tax liability (asset) end of period | (1,198) | (2,368)
Others |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 882 | (278)
Increase (decrease) | (1,143) | 1,160
Deferred tax liability (asset) end of period | (261) | 882
Sub Total |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 2,633 | (9)
Increase (decrease) | (1,536) | 2,642
Deferred tax liability (asset) end of period | 1,097 | 2,633
Deferred tax due to carry-forward deficits |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 701 | 759
Increase (decrease) | 448 | (58)
Deferred tax liability (asset) end of period | 1,149 | 701
Deferred tax due to tax credit carry-forward |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liability (asset), start of period | 236 | 2,078
Increase (decrease) | 1,842 | (1,842)
Deferred tax liability (asset) end of period | ₩ 2,078 | ₩ 236

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- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph o -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_o&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 56 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_56&doctype=Standard -URIDate 2024-03-27 + Details
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